Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c3d7c4e9fde2a4…

MALICIOUS

PDF

39.2 KB Created: 2020-08-25 03:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 48852249596e69fc0d2936a7331ecb53 SHA-1: 4408899b51e57e3854995ea2fa4898f7428830da SHA-256: 89c3d7c4e9fde2a4a97f39e6b111a04518bfc5ee5c1aee6b6b7465c6a9317897
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. This suggests a phishing or scam attempt, likely using the 'free download' lure indicated by the URL parameters and the presence of many benign-looking PDF files hosted on Shopify. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=bully+anniversary+apk+data In PDF document text
    • http://files.js-militaria.com/uploads/1/3/1/6/131637190/jebovosegovuxaso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/duxobivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/21250124174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/genting_singapore_sustainability_report_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/cryptic_quiz_answers_4-_n.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/88155740779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0736/7592/files/tepowesitafipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/97868216226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/accountancy_class_12_important_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/linguistic_typology_morphology_and_syntax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/sotamagikixosid.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE2 5228 bytes
SHA-256: a63a995aab80734fdf2eebff6f3cf121791094642daf2c9ae75b5f833ad05a38
font_01_sfnt_off00006cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC6 10420 bytes
SHA-256: 8b699b101fcd621db1dd784f7afd0b1d7900a37a4fd8fc43f3f0732fba09a3c0

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